Answer: entering the cell must overcome the potassium exiting
To reach threshold the amount of sodium _______.
Threshold potential - Wikipedia
Threshold potential - Wikipedia
Action potential - Wikipedia
Threshold potential - Wikipedia
The threshold value controls whether or not the incoming stimuli are sufficient to generate an action potential. It relies on a balance of incoming inhibitory and excitatory stimuli. The potentials generated by the stimuli are additive and they may reach threshold depending on their frequency and amplitude. Normal functioning of the central nervous systementails a summation of synaptic inputs made largely onto a neuron's dendritic tree. These local graded potentials which are primarily associated with external sti…
Depolarization above threshold results in an increase in the conductance of Na sufficient for inward sodium movement to swamp outward potassium movement immediately. If the influx of sodium ions fails to reach threshold then sodium conductance will not increase a sufficient amount to override the resting potassium conductance.
With the right amount of stimulus it can cause the action potential to reach threshold and cause an influx of sodium during the depolarization phase. After a couple of seconds the membrane potential becomes positive and causes potassium ions to exit the cell during the repolarization phase and go below the threshold level into the ...
There are five phases of an action potential: threshold depolarization peak repolarization and hyperpolarization. Threshold is when the summation of MEPPs reaches a certain poten...
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